91251A820 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

91251A820: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: KNURLED NO. 1, thread_length: 2.376 INCHES NOMINAL IN, fastener_length: 7.000 INCHES NOMINAL IN, hardness_rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL, surface_treatment: OXIDE OVERALL.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-341-1190, 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

91251A820

NSN: 5305-01-341-1190
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)

SPECIFICATIONS

material	STEEL OVERALL
head_style	KNURLED NO. 1
thread_length	2.376 INCHES NOMINAL IN
fastener_length	7.000 INCHES NOMINAL IN
hardness_rating	38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
surface_treatment	OXIDE OVERALL
width_across_flats	0.500 INCHES NOMINAL IN
internal_drive_style	HEXAGON
nominal_thread_diameter	0.938 INCHES IN
minimum_tensile_strength	170000 POUNDS PER SQUARE INCH LBS
thread_series_designator	UNIFIED NATIONAL COARSE (UNC)
NSN	5305-01-341-1190

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL IN

•

FASTENER LENGTH: 7.000 INCHES NOMINAL IN

•

THREAD LENGTH: 2.376 INCHES NOMINAL IN

•

HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL

•

NOMINAL THREAD DIAMETER: 0.938 INCHES IN

•

HEAD STYLE: KNURLED NO. 1

•

SURFACE TREATMENT: OXIDE OVERALL

•

MINIMUM TENSILE STRENGTH: 170000 POUNDS PER SQUARE INCH LBS

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.500 INCHES NOMINAL IN
FASTENER LENGTH	7.000 INCHES NOMINAL IN
THREAD LENGTH	2.376 INCHES NOMINAL IN
HARDNESS RATING	38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER	0.938 INCHES IN
HEAD STYLE	KNURLED NO. 1
SURFACE TREATMENT	OXIDE OVERALL
MINIMUM TENSILE STRENGTH	170000 POUNDS PER SQUARE INCH LBS
INTERNAL DRIVE STYLE	HEXAGON
MATERIAL	STEEL OVERALL

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 1

873231Reference document

Same NSN cross-reference

Reference document — Design control — primary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 91251A820?

91251A820 is a SCREW,CAP,SOCKET HEAD.

What parts can replace 91251A820?

There is 1 known substitute for 91251A820: 873231. Substitute compatibility should be verified for your specific system.

What is the NSN for 91251A820?

91251A820 is cataloged in the U.S. Government catalog under NSN 5305-01-341-1190. This indicates validated use in U.S. government and defense supply chains.

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91251A820 — SCREW,CAP,SOCKET HEAD

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