Fasteners for the Military

Providing Mil Spec fasteners in specialty metals and alloys

Raychin has extensive experience and understanding of military specifications for fasteners whether standard parts or custom per-print. In addition, we are able to provide fasteners according to military material specifications (MS Spec and AN Spec fasteners) and to NAS aerospace specifications (NAS or NASM Spec fasteners) as well. Fasteners can also be made to meet DFARS compliance, meaning the metal used in fabrication must be melted or manufactured in the United States or a qualifying country.

Included in our realm of expertise are the following specifications. Please ask our experts regarding any additional specifications you require assistance with. 

MS and AN Fasteners

In addition to the above specifications, we can also supply Mil Spec (MS) fasteners and Army Navy (AN) fasteners meeting the series below. Additional MS parts are available. Please contact our engineering team for assistance other MS part requirements.

FF-B-561

Mil spec FF-B-561 includes lag bolts having either a square head or a hex head.   

Type I – Gimlet point, screw thread

Type II – Cone point, screw thread

Type III – Cone point, fetter drive thread

    Style 1 – Hex head

    Style 2 – Square head

FF-B-588

Mil Spec FF-B-588 covers toggle bolts and screw expansion sleeves. 

Type I – Spring-wing toggle bolts, with two-piece wings

Class A – Sheet metal winds

    Style 1 – Machine screw

    Style 2 – Continuous thread stud

    Style 3 – Eyebolt

Class B – Wing wings

    Style 1 – Machine screw

    Style 2 – Continuous thread stud

Type II - Tumble-wing toggle bolts, with one-piece sheet metal wings

Class A - Pivoted bolts

    Style 1 – Machine screw

    Style 2 – Continuous thread stud

    Style 3 – Eyebolt

FF-N-836

Mil spec F-N-836 covers cap, castle, hexagon, knurled, slotted, square, welding and single ball seat nuts.

Type I – Nuts, square

    Style 1 – Regular

    Style 2 – Heavy

    Style 3 – Machine screw

Type II – Nuts, hexagon

    Style 4 – Plain

    Style 5 – Jam

    Style 6 – Thick

    Style 7 – Flat

    Style 8 – Flat jam

    Style 9 – Heavy flat

    Style 10 – Heavy flat jam

    Style 11 – Heavy

    Style 12 – Heavy jam

    Style 13 – Machine screw

Type III – Nuts, cap

    Style 14 – High crown

    Style 15 – Low crown

Type IV – Nuts, slotted

    Style 16 – Plain

    Style 17 – Thick

    Style 18 – Heavy

Type V – Nuts plain, castle

Type VII – Nuts plain, knurled

Type VIII – Nuts, welding

    Style 19 – Without pilot

    Style 20 – Pilot

Type VIII – Nuts, plain, single ball seat, hexagon

FF-P-386

FF-P-386 is superseded by ASME B18.8.1

Mil spec FF-P-386 covers split cotter pins.

FF-S-85

Mil spec FF-S-85 for fasteners covers types and styles of slotted and hexagon head cap screws.

Type I – Slotted Head

    Style 1s – Round head

    Style 2s – Flat countersunk head, 82˚

    Style 4s – Fillister head

Type II – Plain head

    Style 10p – Hexagon head

FF-S-86

Mil spec FF-S-86 covers socket head cap screw fasteners with optional hexagon and spline socket configurations.

    Type I – Hexagon socket, cylindrical head, 1936 series. *

    Type III – Internal multiple spline socket cylindrical head, 1936 series. *

    Type IV – Hexagon socket, flat countersunk head, 82˚ included angle.

    Type V – Internal multiple spline socket, flat countersunk head, 82˚ included angle.

    Type VI – Hexagon socket, cylindrical head, 1960 series.

    Type VII – Internal multiple spline socket, cylindrical head, 1960 series.

    Type VIII – Hexagon socket, button head.

    Type IX – Internal multiple spline socket, button head.

    * Do not use for new design.

FF-S-92

Mil spec FF-S-92C covers slotted, cross-recessed and hexagon head machine screws.

Type I - Slotted

    Style 1s – Round head

    Style 2s – Flat head, 82˚

    Style 3s – Flat head, 100˚

    Style 4s – Fillister head

    Style 5s – Fillister head, drilled

    Style 6s – Oval bead, 82˚

    Style 7s – Truss head

    Style 8s – Binding head

    Style 9s – Pan head

    Style 10s – Hexagon head

Type II – Hexagon, plain

    Style 10p – Hexagon

Type III - Cross-Recessed, Recess Designs I and II

    Style 1c - Round head.

    Style 2c - Flat head, 82˚

    Style 3c - Flat head, 100˚

    Style 4c - Fillister head

    Style 6c - Oval head, 82˚

    Style 7c - Truss head

    Style 8c - Binding head

    Style 9c - Pan head

FF-S-107

Mil spec FF-S-107 covers tooth lock washers for use in assemblies with bolts, studs, and machine screws.

Type I – Internal tooth flat

    Grade A – Regular

    Grade B – Heavy-Duty

Type II – External tooth flat

Type III – Internal -external tooth flat

Type IV – External tooth countersunk (80˚- 82˚)

Type V – External tooth countersunk (99˚- 101˚)

    Style 1 – Twisted teeth

    Style 2 – Teeth with up-and-down bent edges

FF-S-111

Mil spec FF-S-111 covers single and double-threaded wood screws with round, flat countersunk and oval countersunk heads having slotted or cross-recessed drives.

Types I – Single thread

Type II – Double thread

Styles:

    1s – Round head, slotted drive

    1c – Round head, cross-recessed drive

    2s – Flat countersunk head, slotted drive

    2c – Flat countersunk head, cross-recessed drive

    6s – Oval countersunk head, slotted drive

    6c – Oval countersunk head, cross-recessed drive

FF-S-200

Mil spec FF-S-200 covers hexagon socket and spline socket headless setscrews.

Types:

    Type I – Hexagon socket, headless

    Type II – Spline socket, headless

Styles. (Setscrews shall be of the following styles):

    Style 1 – Flat point

    Style 2 – Cone point

    Style 3 – Oval point

    Style 4 – Cup point

    Style 5 – Full-dog point

    Style 6 – Half-dog point

FF-S-210

Mil spec FF-S-210 covers set screws: square head (inch) and slotted (inch and metric).

Types:

    Type I – Square head, inch dimensions

    Type II – Slotted headless, inch dimensions

    Type III – Slotted headless, metric dimensions

Styles. (Setscrews shall be of the following styles):

    Style 1 – Flat point

    Style 2 – Cone point

    Style 3 – Oval point

    Style 4 – Cup point

    Style 5 – Full-dog point

    Style 6 – Half-dog point

FF-W-84

Mil spec FF-W-84 is for (spring) lock washers. This spec covers a helical spring type washer for us with nuts, bolts, screws, and studs to prevent them from loosening.

FF-W-92

Mil spec FF-W-92 covers plain, flat washers.

Type A – Round washer

Type B – Square wash

FF-W-100

Mil spec FF-W-100 covers tooth lock washers for use in assemblies with bolts, studs and machine screws.

Type I – Internal tooth flat

    Grade A - Regular

    Grade B – Heavy duty

Type II – External tooth flat

Type III – Internal-external tooth flat

Type IV – External tooth countersunk (80˚-82˚)

Type V – External tooth countersunk (99˚-101˚)

    Style 1 – Twisted teeth

    Style 2 – Teeth with up-and-down bent edges

MIL-DTL-1222, MIL-S-1222, and MIL-B-857

MIL-B-857 is superseded by MIL-S-1222; MIL-S-1222 is superseded by MIL-DTL-1222

Mil spec MIL-DTL-1222 covers standard studs, hex cap screws, and heavy hex bolts in nominal standard diameters of ¼ inch to 4 inches, nuts in nominal standard diameters of ¼ inch to 3 inches, and socket head cap screws in nominal standard diameters of ¼ inch to 1½ inches for applications where a high degree of reliability is required. MIL-DTL-1222 covers a variety of materials, including:  Nickel Alloys, Corrosion Resistant Steels (CRES), Titanium, and Aluminum.

Studs

    Type I – Full body

    Type II – Reduced body

    Type III – Constant strength body

    Type IV - Continuous thread (bolt-stud)

Bolts

    Type II – Heavy hex

    Type III – Heavy hex structural

Screws

    Type I – Hex cap

    Type II – Socket head cap

Nuts

    Type I – Hex

    Type II – Hex jam

    Type III – Heavy hex

    Type IV – Heavy hex jam

    Type V – Hex slotted

MIL-DTL-18240 and  MIL-F-18240

MIL-F-18240 is superseded by MIL-DTL-18240.

Mil spec MIL-DTL-18240 defines the requirements for self-locking elements for use in externally threaded fasteners such as bolts and screws to be used in fasteners with either UNC, UNJC, UNF, UNJF, UNRC or UNRF threads and where the temperatures will not exceed 250°F. It includes three types of self-locking elements:

    Type N – Plug/pellet

    Type L – Strip

    Type P – Patch

NASM 25027, MIL-DTL-25027 and MIL-N-25027

MIL-N-25027 is superseded by MIL-DTL-25027; MIL-DTL-25027 is superseded by NASM 25027.

Mil spec NASM25027 covers the requirements for steel, corrosion resistant steel (CRES), aluminum alloy, copper alloy and nickel-copper alloy (Monel 400) self-locking nuts.

    250˚F nuts

    450˚F nuts

    800˚F nuts

MIL-F-19700

Mil spec MIL-F-19700 describes the characteristics of nonmagnetic, screw threaded fasteners and related items that are dimensionally in conformance to recognized military and industrial standards. The intent of this specification is to supplement, not supersede, the specifications normally used for the acquisition of threaded fasteners and related items.

Bolts

    Type I – Round head

    Type II – Hexagon head

    Type III – Hexagon head, UNC-3A (for use with type V self-locking nuts)

    Type IV – Finished neck, countersunk, flat head

Machine screws

    Type I – Flat head, 82˚, cross recessed

    Type II – Pan head, cross recessed

    Type III – Fillister head, slotted and drilled

    Type IV – Flat head, 82˚, slotted

    Type V – Pan head, slotted

Wood screws

    Type I – Flat head, 82˚, cross recessed

    Type II – Round head, cross recessed

    Type III – Oval head, cross recessed

    Type IV – Flat head, 82˚, slotted

    Type V – Round head, slotted

    Type VI – Oval head, slotted

Lag screws

    Type I – Square bolt head

    Type II – Slotted countersunk head

Studs

    Type I – Full body

Nuts

    Type I – Hexagon, top chamfered, machine screw

    Type II – Hexagon, regular finished

    Type III – Hexagon, regular finished jam

    Type IV – Square, regular

    Type V – Hexagon, self locking nylon insert (Class C material only).

Cap screws

    Type I – Hexagon head

Pins

    Type I – Split cotter

Washers

    Type I – Metal, flat, plain, round

    Type II – Spring, nonlink lock

    Type III – Internal tooth, flat lock

    Type IV – External tooth, flat lock

MIL-I-8846

Mil spec MIL-I-8846 covers helical coil screw-thread inserts made from formed wire, the inner surfaces of which, after assembly, provide threads as specified.

Type I – Coarse thread

    Class 1 – Free running

    Class 2 – Screw locking (self-locking)

Type II – Fine thread

    Class 1 – Free running

    Class 2 – Screw locking (self-locking)

Type III – Taper pipe thread

    Class 5 – NPT pipe thread

    Class 6 – ANPT pipe thread

Type IV – Metric

    Class 3 – Staking (spark plug thread)

MIL-DTL-32258 and MIL-N-25027/1

MIL-N-25027/1 is superseded by MIL-DTL-32258.

Mil spec MIL-N-25027 covers the requirements for nickel-copper alloy (Monel 400 and 405), self-locking heavy hex nuts.

MIL-P-10971

Mil spec MIL-P-10971 covers tubular-shaped spring pins constructed to resist reduction in pin diameter by means of spring action.

Type I – Slotted

Type II – Coiled

Classes:

    Class 1 – Heavy duty

    Class 2 – Standard duty

    Class 4 – Light duty

MIL-P-16610

Mil spec MIL-P-16610 covers carbon, alloy and corrosion-resisting steel taper pins.

MIL-P-21143

Mil spec MIL-P-21143 covers solid, cylindrical, steel, headless straight pins, which are commonly referred to as dowel or machine pins.

MIL-PRF-907F

Mil spec MIL-PRF-907F covers antiseize compound for use on threads of steel nuts, studs, bolts and other mating surfaces, including those of superheated steam installations, at temperatures up to 1050 degrees Fahrenheit (°F) (566 degrees Celsius (°C)).

MIL-S-21472

Mil spec MIL-S-21472 covers hexagon socket-head shoulder screws and slotted-head shoulder screws. 

MIL-S-24149

Mil spec MIL-S-24149 covers studs for welding with stud welding equipment and arc shields (ferrules) for shielding studs where applicable.