Insize 55° Setting Standard for Screw Thread Micrometers 100–125 mm Series 3281-SP4

Insize 55° Setting Standard The Insize 3281-SP4 is a 55° setting standard used to set and verify Insize 3281 series screw thread micrometers for 55° thread forms (e.g., Whitworth). It...
£119.00
£119.00
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Vendor: INSIZE
SKU: 3281-SP4
Availability: In Stock
Subtotal: £119.00
Insize 55° Setting Standard for Screw Thread Micrometers 100–125 mm – Series 3281-SP4

Insize 55° Setting Standard for Screw Thread Micrometers 100–125 mm Series 3281-SP4

£119.00

Insize 55° Setting Standard for Screw Thread Micrometers 100–125 mm Series 3281-SP4

£119.00

Insize 55° Setting Standard

The Insize 3281-SP4 is a 55° setting standard used to set and verify Insize 3281 series screw thread micrometers for 55° thread forms (e.g., Whitworth). It is an optional accessory matched to the 100–125 mm micrometer size and ensures accurate pitch-diameter measurements when a 55° thread angle is required.

Specifications :

  • Part No: 3281-SP4
  • Compatible Micrometers: 3281-125A, 3281-S125
  • Range: 100–125 mm
  • L: 143 mm
  • b: 70 mm
  • Thread Angle: 55° setting standard (optional accessory)
  • Measuring Tips: 6 pairs of measuring tips - metric and unified thread (60° thread angle) 
    • 0.4-0.5mm/ 64-48TPI, 0.6-0.9mm/ 44-28TPI, 1-1.75mm/ 24-14TPI, 2-3mm/ 13-9TPI, 3.5-5mm/8-5TPI, 5.5-7mm/ 4.5-3.5TPI
  • Use With: Insize 3281 series screw thread micrometers
  • Notes: 60° setting standards are supplied with micrometers (except 0–25 mm); 55° standards like SP4 are optional.

Precisely matched to the 100–125 mm size, the INSIZE 3281-SP4 setting standard helps achieve reliable and repeatable measurements on 55° thread forms.

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