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71858 — WASHER,FLAT

✓ Government record, cited
Hama · NUT WASHER
PRODUCT OVERVIEW

71858: WASHER,FLAT.

- Standard filter for colour shots outside (like Skylight 1 A, but with enhanced properties) - Especially suitable for open air portraits - The spectral transparency is enhanced – especially in green areas - Multi-layer coating (HTMC): four layers of coating are vapour-deposited on each side - Quality standard (glass): ProClass***** - Impact of the picture: - More differentiated and natural colour reproduction - When portraits are shot outside, the skin tones are more natural and free from colour cast This part is cataloged in the U.S. Government catalog under NSN 5310-00-193-9987, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
71858
NSN: 5310-00-193-9987
FSC: 5310 — Nuts and Washers
CAGE: 64959 — AMERICAN TELEPHONE AND TELEGRAPH CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.031 INCHES NOMINAL IN
hole_diameter0.250 INCHES NOMINAL IN
overall_diameter0.500 INCHES NOMINAL IN
surface_treatmentNICKEL OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-193-9987
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 71858 · Hama ⚠ 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
•
OVERALL DIAMETER: 0.500 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: NICKEL OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.250 INCHES NOMINAL IN
•
THICKNESS: 0.031 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.500 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTNICKEL OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.250 INCHES NOMINAL IN
THICKNESS0.031 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
71857Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
111767Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 71858?
71858 is a WASHER,FLAT manufactured by Hama.
What parts can replace 71858?
There are 2 known substitutes for 71858: 71857, 111767. Substitute compatibility should be verified for your specific system.
What is the NSN for 71858?
71858 is cataloged in the U.S. Government catalog under NSN 5310-00-193-9987. This indicates validated use in U.S. government and defense supply chains.
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