MILB857 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

MILB857: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400 OVERALL, head_style: HEXAGON, head_height: 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.984 INCHES NOMINAL IN, fastener_length: 3.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-009-9157, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

MILB857

NSN: 5305-00-009-9157
NIINs: 000099157, 000426097, 000426719, 000434568, 000548282, 000680373, 000795995, 000891425, 001740536, 001740537, 001741932, 001744146, 001749479, 001749505, 001749546, 001749551, 001749617, 001749744, 001887894, 001895184, 001898514, 001933589, 002063120, 002064261, 002064307, 002064317, 002078593, 002086873, 002086875, 002088032, 002088402, 002258507, 002264835, 002264839, 002268905, 002269207, 002269910, 002270556, 002270559, 002270566, 002270568, 002270577, 002270610, 002270623, 002270852, 002270917, 002270934, 002406831, 002487824, 002488058, 002607780, 002607895, 002608845, 002611150, 002634038, 002634736, 002637298, 002637300, 002637304, 002637305, 002637309, 002637314, 002661115, 002685761, 002709418, 002709424, 002709426, 002709465, 002712275, 002712294, 002723716, 002724223, 002724308, 002742118, 002755332, 002768274, 002811655, 002812811, 002823693, 002829043, 002857438, 002925783, 002925785, 002977577, 002992339, 002992360, 002992379, 002992380, 002992391, 002992837, 003503015, 003620178, 003794569, 004041385, 004239201, 004239997, 004689900, 004703403, 004733946, 004733969, 004733970, 004733971, 004733977, 004733980, 005275148, 005500461, 005505030, 005584031, 005584041, 005588165, 005588208, 005588209, 005761032, 005791427, 005969672, 006147042, 006147060, 006196283, 006371994, 006373676, 006373677, 006379008, 006387581, 006602117, 006807089, 007215887, 007638911, 007638912, 008152928, 008892718, 009052814, 009052815, 009052818, 009169329, 009174713, 009829872, 009829880, 010180842, 010283481, 011792885, 012018864, 012018865, 012018866, 012018867, 012018868, 012018871, 012018872, 012018873, 012023400, 012023401, 012410672, 012447563, 013263409, 013892673, 014423768, 014473474, 014864459, 014865557, 014867543, 014867547, 014870801, 014975492, 014975653, 014975659, 015077094, 015077144, 015077162
FSC: 5305 — Screws
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

SPECIFICATIONS

material	NICKEL ALLOY 400 OVERALL
head_style	HEXAGON
head_height	0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
thread_class	2A A
thread_length	0.984 INCHES NOMINAL IN
fastener_length	3.000 INCHES NOMINAL IN
hardness_rating	80.0 ROCKWELL B MINIMUM OVERALL
thread_direction	RIGHT-HAND
width_between_flats	1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
end_item_identification	HATCH COVER, LOCKING RING TYPE
nominal_thread_diameter	0.750 INCHES IN
minimum_tensile_strength	80000 POUNDS PER SQUARE INCH LBS
NSN	5305-00-009-9157

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN

•

FASTENER LENGTH: 1.157 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN

•

SPECIAL TEST FEATURES: SPECIAL QUALITY CONTROL TESTING

•

THREAD LENGTH: 0.901 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.750 INCHES IN

•

HEAD STYLE: HEXAGON

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
FASTENER LENGTH	1.157 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN
SPECIAL TEST FEATURES	SPECIAL QUALITY CONTROL TESTING
THREAD LENGTH	0.901 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.750 INCHES IN
HEAD STYLE	HEXAGON
THREAD DIRECTION	RIGHT-HAND
WIDTH BETWEEN FLATS	1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA	3 TYPE

OTHER ITEMS IN FSC 5305 — Screws

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753

SUBSTITUTES & CROSS-REFERENCES 2

5305PL1732615Reference document

Same NSN cross-reference

Reference document — Informative reference only

2620-709X4PC154Reference document

Same NSN cross-reference

Reference document — Design control — primary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is MILB857?

MILB857 is a SCREW,CAP,HEXAGON HEAD.

What parts can replace MILB857?

There are 2 known substitutes for MILB857: 5305PL1732615, 2620-709X4PC154. Substitute compatibility should be verified for your specific system.

What is the NSN for MILB857?

MILB857 is cataloged in the U.S. Government catalog under NSN 5305-00-009-9157. This indicates validated use in U.S. government and defense supply chains.

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MILB857 — SCREW,CAP,HEXAGON HEAD

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