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221B648-11 — WASHER,SADDLE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

221B648-11: WASHER,SADDLE.

The WASHER,SADDLE is a the manufacturer industrial component. Key specifications include material: PLASTIC ACETAL OVERALL, hole_diameter: 0.421 INCHES MINIMUM AND 0.425 INCHES MAXIMUM IN, overall_height: 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN, outside_diameter: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN, style_designator: SADDLE, thickness_at_bolt_hole: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-133-4874, 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
221B648-11
NSN: 5310-01-133-4874
FSC: 5310 — Nuts and Washers
CAGE: 30941 — EAST/WEST INDUSTRIES, INC. (USA)
SPECIFICATIONS
materialPLASTIC ACETAL OVERALL
hole_diameter0.421 INCHES MINIMUM AND 0.425 INCHES MAXIMUM IN
overall_height0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
outside_diameter0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
style_designatorSADDLE
thickness_at_bolt_hole0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
NSN5310-01-133-4874
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 221B648-11 · 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
•
STYLE DESIGNATOR: SADDLE
•
OUTSIDE DIAMETER: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
•
THICKNESS AT BOLT HOLE: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
•
COLOR: BLACK OVERALL
•
MATERIAL: PLASTIC ACETAL OVERALL
•
HOLE DIAMETER: 0.421 INCHES MINIMUM AND 0.425 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
STYLE DESIGNATORSADDLE
OUTSIDE DIAMETER0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
THICKNESS AT BOLT HOLE0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
COLORBLACK OVERALL
MATERIALPLASTIC ACETAL OVERALL
HOLE DIAMETER0.421 INCHES MINIMUM AND 0.425 INCHES MAXIMUM IN
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 221B648-11?
221B648-11 is a WASHER,SADDLE.
What is the NSN for 221B648-11?
221B648-11 is cataloged in the U.S. Government catalog under NSN 5310-01-133-4874. 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.