PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 1388A
1388A ✓ 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.120 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN, hole_diameter: 0.453 INCHES NOMINAL IN, overall_diameter: 0.875 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-350-5936, 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
1388A
NSN: 5310-00-350-5936
FSC: 5310
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.120 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
hole_diameter0.453 INCHES NOMINAL IN
overall_diameter0.875 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-350-5936
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1388A · 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
•
THICKNESS: 0.120 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.453 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
MATERIAL: STEEL OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 0.875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.120 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
HOLE DIAMETER0.453 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
MATERIALSTEEL OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER0.875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
1388Interchangeable
interchangeable cross-reference
interchangeable
SAE-AS50861/2Interchangeable
interchangeable cross-reference
interchangeable
M5088/289Interchangeable
interchangeable cross-reference
interchangeable
BMS13-13T1C1-8Interchangeable
interchangeable cross-reference
interchangeable
961-0032-0Interchangeable
interchangeable cross-reference
interchangeable
4030820-0701Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy 1388A?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 1388A?
1388A is a WASHER,FLAT.
What parts can replace 1388A?
There are 19 known substitutes for 1388A: 1388, SAE-AS50861/2, M5088/289 and 16 more. Substitute compatibility should be verified for your specific system.
Is 1388A still available?
1388A is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 1388A

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026