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CA2691-5 — NUT,PLAIN,ASSEMBLED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

CA2691-5: NUT,PLAIN,ASSEMBLED WASHER.

The NUT,PLAIN,ASSEMBLED WASHER is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: FLAT WITH TURNED BACK EDGE, nut_height: 0.250 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, overall_height: 0.441 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-503-5977, 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
CA2691-5
NSN: 5310-00-503-5977
FSC: 5310 — Nuts and Washers
CAGE: 29372 — HOWMET GLOBAL FASTENING SYSTEMS INC. DIV TRIDAIR PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleFLAT WITH TURNED BACK EDGE
nut_height0.250 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
overall_height0.441 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_across_flats0.493 INCHES NOMINAL IN
nominal_thread_size0.312 INCHES IN
washer_outside_diameter0.646 INCHES NOMINAL IN
thread_quantity_per_inch24
NSN5310-00-503-5977
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: CA2691-5 · 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
•
WASHER OUTSIDE DIAMETER: 0.646 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.493 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
NUT HEIGHT: 0.250 INCHES NOMINAL IN
•
NUT STYLE: FLAT WITH TURNED BACK EDGE
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.441 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER0.646 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.493 INCHES NOMINAL IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES IN
NUT HEIGHT0.250 INCHES NOMINAL IN
NUT STYLEFLAT WITH TURNED BACK EDGE
THREAD CLASS3B
THREAD QUANTITY PER INCH24
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 CA2691-5?
CA2691-5 is a NUT,PLAIN,ASSEMBLED WASHER.
What is the NSN for CA2691-5?
CA2691-5 is cataloged in the U.S. Government catalog under NSN 5310-00-503-5977. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.