20-057-4S18D — BOLT,SHEAR

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

20-057-4S18D: BOLT,SHEAR.

The BOLT,SHEAR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, grip_length: 1.125 INCHES NOMINAL IN, head_height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.2485 INCHES MINIMUM AND 0.2489 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-437-3178, 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

20-057-4S18D

NSN: 5306-01-437-3178
FSC: 5306 — Bolts
CAGE: 97499 — BELL TEXTRON INC (USA)

SPECIFICATIONS

material	STEEL OVERALL
head_style	HEXAGON
grip_length	1.125 INCHES NOMINAL IN
head_height	0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
thread_class	3A A
grip_diameter	0.2485 INCHES MINIMUM AND 0.2489 INCHES MAXIMUM IN
thread_length	0.343 INCHES NOMINAL IN
fastener_length	1.468 INCHES NOMINAL IN
special_features	DRILLED SHANK
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM OVERALL
width_between_flats	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
NSN	5306-01-437-3178

COMPONENT DIAGRAM

KEY FEATURES

•

EXTENDED WASHER THICKNESS: 0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN

•

HEAD HEIGHT: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN

•

FASTENER LENGTH: 1.468 INCHES NOMINAL IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 0.343 INCHES NOMINAL IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-7838 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.250 INCHES IN

•

HEAD STYLE: HEXAGON

TECHNICAL CHARACTERISTICS

EXTENDED WASHER THICKNESS	0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
HEAD HEIGHT	0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
FASTENER LENGTH	1.468 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.343 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-B-7838 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	HEXAGON
THREAD DIRECTION	RIGHT-HAND
GRIP LENGTH	1.125 INCHES NOMINAL IN

OTHER ITEMS IN FSC 5306 — Bolts

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

5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017

SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 20-057-4S18D?

20-057-4S18D is a BOLT,SHEAR.

What is the NSN for 20-057-4S18D?

20-057-4S18D is cataloged in the U.S. Government catalog under NSN 5306-01-437-3178. This indicates validated use in U.S. government and defense supply chains.

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20-057-4S18D — BOLT,SHEAR

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