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SAC178 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 52100 OVERALL, first_end_style: RADIUS, pin_overall_length: 0.500 INCHES NOMINAL IN, pin_overall_diameter: 0.3115 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN, first_end_corner_radius: 0.031 INCHES NOMINAL IN, material_document_and_classification: AMS 6440 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-282-1391, 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
SAC178
NSN: 5315-00-282-1391
FSC: 5315
CAGE: K1226 — DEWHURST PLC (GBR)
SPECIFICATIONS
materialSTEEL COMP 52100 OVERALL
first_end_styleRADIUS
pin_overall_length0.500 INCHES NOMINAL IN
pin_overall_diameter0.3115 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN
first_end_corner_radius0.031 INCHES NOMINAL IN
material_document_and_classificationAMS 6440 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
second_end_relationship_with_first_endIDENTICAL
NSN5315-00-282-1391
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SAC178 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: STEEL COMP 52100 OVERALL
•
FIRST END CORNER RADIUS: 0.031 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6440 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
PIN OVERALL LENGTH: 0.500 INCHES NOMINAL IN
•
PIN OVERALL DIAMETER: 0.3115 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN
•
FIRST END STYLE: RADIUS
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 52100 OVERALL
FIRST END CORNER RADIUS0.031 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6440 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
PIN OVERALL LENGTH0.500 INCHES NOMINAL IN
PIN OVERALL DIAMETER0.3115 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN
FIRST END STYLERADIUS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
B16.3Interchangeable
interchangeable cross-reference
interchangeable
1105-1Interchangeable
interchangeable cross-reference
interchangeable
WWP521Interchangeable
interchangeable cross-reference
interchangeable
30294500Interchangeable
interchangeable cross-reference
interchangeable
SWE1105-1Interchangeable
interchangeable cross-reference
interchangeable
1053Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SAC178?
SAC178 is a PIN,STRAIGHT,HEADLESS.
What parts can replace SAC178?
There are 18 known substitutes for SAC178: B16.3, 1105-1, WWP521 and 15 more. Substitute compatibility should be verified for your specific system.
Is SAC178 still available?
SAC178 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026