Stainless Steel Hexagon Backnut

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Useful Information

Technical Specification

  • Material: Stainless Steel - CF8M (316)
  • Connection Type: Hexagon backnut (lock nut)
  • Standard: ISO 4144
  • Thread Type: BSPP (ISO 228)
  • Thread Gender: Female
  • Operating Temperature Range: -20°C to +260°C
  • Maximum Working Pressure: 20 bar
  • Available Sizes: ⅛" to 4"
  • Manufacturing Standard: ASTM A-351

Description

Engineered for use as a securing or locking component, this hexagon backnut provides a reliable means of fastening threaded fittings, unions, or flanges in place. Constructed from corrosion-resistant 316 stainless steel (CF8M), it offers long-term durability in demanding environments. The BSPP parallel female thread ensures accurate alignment and compatibility, while the hexagonal profile allows for straightforward tightening using standard tools. Ideal for mechanical restraint and position-locking in fluid and gas systems.

Key Features & Benefits

  • Designed for securely locking threaded components in place
  • BSPP female threads ensure compatibility with standard fittings
  • 316 stainless steel construction offers high corrosion resistance
  • ISO 4144 and ASTM A-351 compliant for quality and reliability
  • Operates in temperatures from -20°C to +260°C
  • Suitable for industrial, chemical, marine, and food-grade applications
  • Hexagonal shape allows easy installation and removal with tools
  • Available in a wide range of sizes to suit varied pipe systems

Hexagon Backnut - Stainless Steel Fittings

Nominal Diameter (inch) A (mm) B (mm) Weight (kg)
6 18 0.007
¼ 6.15 21 0.011
7.15 26 0.021
½ 8 31 0.03
¾ 9 35 0.036
1 10 45 0.065
11 54 0.103
12 59 0.112
2 13 74 0.203
16 93.5 0.387
3 19 106 0.5
4 23 134 0.924

 

IMPORTANT: The technical data given on this website is for preliminary information purposes only and is published without guarantee. All line drawings are for illustrative purposes only and should not be regarded as wholly accurate in every detail. We reserve the right to withdraw or to alter the specification of any product without notice. For more information, please consult our Terms of Business.

If you require any further information, our excellent customer service team is here to help so please call us on 01794 835835.

 

Grouped product items
Code Product Name List Price You Save You Pay Quantity
358074 SS Hexagon Backnut Threaded 1/8" £1.25 45%
You Pay:  £0.69
358075 SS Hexagon Backnut Threaded 1/4" £1.25 45%
You Pay:  £0.69
358076 SS Hexagon Backnut Threaded 3/8" £1.56 45%
You Pay:  £0.86
358077 SS Hexagon Backnut Threaded 1/2" £2.11 45%
You Pay:  £1.16
358078 SS Hexagon Backnut Threaded 3/4" £2.94 45%
You Pay:  £1.62
358079 SS Hexagon Backnut Threaded 1" £3.68 45%
You Pay:  £2.02
358080 SS Hexagon Backnut Threaded 1 1/4" £5.28 45%
You Pay:  £2.90
358081 SS Hexagon Backnut Threaded 1 1/2" £6.76 45%
You Pay:  £3.72
358082 SS Hexagon Backnut Threaded 2" £9.30 45%
You Pay:  £5.12
358083 SS Hexagon Backnut Threaded 2 1/2" £18.15 45%
You Pay:  £9.98
358084 SS Hexagon Backnut Threaded 3" £24.79 45%
You Pay:  £13.63
358085 SS Hexagon Backnut Threaded 4" £41.60 45%
You Pay:  £22.88