HR257-5-11L — SCREW,CLOSE TOLERANCE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

HR257-5-11L: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: COBALT COMP MP-35-N OVERALL, head_style: FLAT COUNTERSUNK, grip_length: 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, head_diameter: 0.573 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-471-6984, 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

HR257-5-11L

NSN: 5305-01-471-6984
FSC: 5305 — Screws
CAGE: 73197 — HI-SHEAR CORPORATION (USA)

SPECIFICATIONS

material	COBALT COMP MP-35-N OVERALL
head_style	FLAT COUNTERSUNK
grip_length	0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
thread_class	3A A
grip_diameter	0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
head_diameter	0.573 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
thread_length	0.582 INCHES NOMINAL IN
fastener_length	1.255 INCHES MINIMUM AND 1.285 INCHES MAXIMUM IN
special_features	DRY FILM LUBE-THREADS ONLY
thread_direction	RIGHT-HAND
countersink_angle	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
surface_treatment	PASSIVATE OVERALL
NSN	5305-01-471-6984

COMPONENT DIAGRAM

KEY FEATURES

•

FASTENER LENGTH: 1.255 INCHES MINIMUM AND 1.285 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 0.582 INCHES NOMINAL IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5844 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.312 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK

•

THREAD DIRECTION: RIGHT-HAND

•

GRIP LENGTH: 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN

TECHNICAL CHARACTERISTICS

FASTENER LENGTH	1.255 INCHES MINIMUM AND 1.285 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.582 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5844 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.312 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK
THREAD DIRECTION	RIGHT-HAND
GRIP LENGTH	0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
GRIP DIAMETER	0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
SPECIAL FEATURES	DRY FILM LUBE-THREADS ONLY

OTHER ITEMS IN FSC 5305 — Screws

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

5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831

SUBSTITUTES & CROSS-REFERENCES 2

PBF1570-5-11LSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

125300-5-11LSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

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 HR257-5-11L?

HR257-5-11L is a SCREW,CLOSE TOLERANCE.

What parts can replace HR257-5-11L?

There are 2 known substitutes for HR257-5-11L: PBF1570-5-11L, 125300-5-11L. Substitute compatibility should be verified for your specific system.

What is the NSN for HR257-5-11L?

HR257-5-11L is cataloged in the U.S. Government catalog under NSN 5305-01-471-6984. This indicates validated use in U.S. government and defense supply chains.

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